Garbage grinder



Sept. 1, 1959 H. HIGER 2,902,228

7 GARBAGE GRINDER Filed June 1,' I956 A TTOR/VEX United States Patent i GARBAGE GRINDER Higel", lioyal Dali, Mich.

Application June 1, 1956, Serial No. 588,853

7 Claims. 1 (Cl. 241257) This invention relates to cutting and disintegrating machines and more particularly to an improved machine of such a nature adapted for garbage disposal.

In constructing machines of this nature difiiculty has been encountered'in the cut matter or garbage, in its mushy or semi-liquid state gradually filling the recess of-the machine, and uncut pieces of garbage being thrown up from the machine and'splattered around when the cover of the machine is open for loading additional-garbage 'thereinto.

One of the objects of the present invention is-toprovide an improved cutting and-disintegrating machine including improved'means adapted to stir the uncut garbage in the machine thus preventing it from being cut faster than the'mushy substance may be discharged by the machine.

Another; object of the invention is to provide a machine of the nature specified in the preceding paragraph with said improved meansv thereof being so constructed as to prevent the uncut matter and water from being thrown up and splattered out of 'the machine Whenthe cover. is opened for intermittent loading.

A further object of the present invention is to provide an' improved'cutting and disintegrating machine, particularlyfor garbage disposal, in which machine the uncut matter is not permitted to drop down too fast or to fly up but rotates or flies Within the machine at a short'distance above the rotor along the inner walls .of the casing.

It is an added object of the present invention to provide a machine of the foregoing character which is simple and rugged in construction, safe and dependable'inoperation, and is relatively inexpensive to manufacture and toservice.

Further objects and advantages of this invention will be apparent from the following description and appended claims, reference beinghad to the accompanying drawings forming a part of this specification, wherein like reference characters designate corresponding parts in the several views.

Fig. 1 is a verticalvsectional view-of the machine embodying the present invention, with the section being taken along the-vertical axis of the machine.

Fig. 2 is a top view of the-machine, partly in section, said view being taken on the section plane passing through the line 2-2 of Fig. 1.

Fig. 3 is a sectional view taken on the section planes passing through the broken line 3-3 of Fig. 2.

Fig. 4 is a perspective view of the rotor shown separately.

It is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawings, since the invention is capable of other embodiments and of being practiced or carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein is for the purpose of description and not of limitation.

In accordance with the invention, I construct the rotor ice body in the formof a relatively fiat cone inor'der to decrease the speed of the matter to be cut passing through the wedging annular recess formed between the rotor and the walls of the casing. Moreover, I provide on the rotor body between the blades thereof cam means and groove means adaptedto throw the matter to be cut and water toward'the walls of the casing and at a relatively flat angle, thus keeping the uncut matter in suspension and preventing it from both overloading the rotor as well as flying up and splattering around the machine.

Referring specifically to the drawing, the machine illu's trated therein comprises a cylindrical base 10 having a bottom 11 supported'on legs 12, and an annular Wall 13 of'the substantially cone shape formed Within the base 10; The upper portion of said wall 13' and the'bottom 11 are provided with apertures adapted to receive an electric motor 15 encased in a liquid-tight casing sup ported in the base in any suitable manner such as with the aid of screws 16. The rotor, generally designated by the numeral 20, is drivingly connected to the armature shaft 21 of the motor and is retained in place thereon with the aid of hexagon head screw 22. Flanges 17 are provided around the upper edges of the. base 10 to support a cylindrical casing 23, connected'tothe base 10 at said flanges with the aid of screws 24. t The top of the casing 23 may be covered with a suitable'loading door or provided with a hopper of any desired.

section with the angle of said cross section being approximately 55. '1 have found that under certain conditions smaller angles may cause the matter to wedgerinto said recess and to overloadthe lower portions thereof.

The rotor'body may be made in the form of a casting hollowedl'out in its middle lowerv portion, as is best shownv at 23 in Fig. 3, with the vanes 29 being formed on-the.

flat bottom surface of the cone body. Two wings 30 and 3-1 are provided on the rotor body and serve as.

supports for the blades32 and 33 secured to said wings in any suitable manner such as with the aidof screws or.

bolts 34. The blades may also be made integralwith the rotor body. Rotor blades 32 and 33 cooperate with cas-- ing b1ades35, 36 and 37 (see Fig. 2). With the two blades being provided on the rotor and three blades provided on the casing, only one pair of blades is in cutting engagement at one time, as isbest shown in Fig. 2, thereby decreasing the power and strength requirement fo'r'the machine.-

As .is best shown in Fig. 4, the rotor blades 32and 33 are;

inclined'with respect to' the axis of the rotor, with' their substantially horizontal top edges being set to overhang their bottom edges or portions.

On the cone body between the wings 30 and 31 thereof there are formed cams 40 and 41 and grooves 42 and 43. The cams 40 and 41 form shelves extending from the axis of the cone body substantially horizontal, as is best shown in Fig. 3, and rising from the blade at a relatively small angle such as 25 30, thus providing rising cam surfaces 40a and 41a. The cams 40 and 41 at their rear and side portions drop abruptly as is best shown at 40b, 40c and 41b and 41c, respectively. Because of such a construction, the force components produced by the cams 4t and 41 in the upward direction are such that the uncut matter is not thrown upwardly very far but is thrown only with suflicient force to go up for a certain distance in the chamber 25 but not to fly out through the top of the casing 23. Provision of the grooves 42 and 43 has also been found to be very beneficial for the operation of the machine, partly in its action on the uncut matter and partly in guiding or channeling the water flowing into the machine through the discharge 216.

Provision of the vanes 29 operates to keep the cut matter in rotation and, therefore, to facilitate its discharge through the conduit 45 not only by gravity but also by increasing pressure in the liquid mass of the cut matter and water by centrifugal action.

The machine disclosed above is very simple and compact. It is very efficient and rugged. It is capable of cutting or crushing matter that clogs or breaks convention garbage disposal machines. It is very easy to operate, to disassemble and service, and is relatively inexpensive to manufacture.

By virtue of the above disclosed construction, the objects of the present invention listed above and numerous additional advantages are attained.

I claim:

1. In a garbage grinding apparatus, a vertically extending'casing, a cone shaped rotor operatively mounted within said casing and forming with the walls of said casing at the lower portion thereof an annular recess having a bottom sloping downwardly from its center toward its circular periphery and a matter-receiving chamber above said rotor, a plurality of blades on said casing having vertical cutting edges, a difierent plurality of blades on said rotor, each of said rotor blades having substantially horizontal top edges and substantially vertical side edges, said vertical edges adapted to come into meeting cutting engagement with the blades on said casing, a plurality of matter-stirring cams provided on said rotor between said blades, said cams having an angular surface making an angle of approximately 30 with the cone surface of said rotor.

2. In a garbage grinding apparatus, a vertically extending casing, a cone shaped rotor operatively mounted within said casing and forming with the Walls of said casing at the lower portion thereof an annular recess having a bottom sloping downwardly from its center toward its circular periphery and a matter-receiving chamber above said rotor, a plurality of blades on said casing having vertical cutting edges, a diiferent plurality of blades on said rotor, each of said rotor blades having substantially horizontal top edges and substantially vertical side edges, said vertical edges adapted to come into meeting cutting engagement with the blades on said casing, a plurality of matter-stirring cams provided on said rotor immediately behind each blade and gradually rising therefrom and terminating in an abrupt stop.

3. In a garbage grinding apparatus, a vertically extending casing, a cone shaped rotor operatively mounted within said casing and forming with the walls of said casing an annular recess having a bottom sloping downwardly from its center toward its circular periphery, a plurality of blades on said casing having vertical cutting edges, a. difierent plurality of blades on said rotor, said rotor blades having substantially horizontal top edges and vertical side edges, with said edges adapted to come into meeting cutting engagement with the vertical edges of the blades on said casing, and a groove provided on the cone surface of the rotor at an angle to its periphery and in the direction of its rotation.

4. In a garbage grinding apparatus, a vertically extending casing, a cone shaped rotor operatively mounted within said casing and forming with the walls of said casing an annular recess having a bottom sloping downwardly at an angle of approximately 35 from its center toward its circular periphery, a plurality of blades on said casing having vertical cutting edges, a different plurality of blades on said rotor, said rotor blades having substantially horizontal top edges and vertical side edges, with said edges adapted to come into meeting cutting engagement with the vertical edges of the blades on said casing, a plurality of matter-stirring cams provided on said rotor behind each blade, said cams gradually rising therefrom, and-a groove provided on the cone surface of the rotorat an angle to its periphery and in the direction of its rotation.

5. In a garbage grinding apparatus, a vertically extend ing easing, a cone shaped rotor operatively mounted within said casing and forming with the walls of said casing an annular recess having a bottom sloping downwardly from its center toward its circular periphery, a plurality of blades on said casing having substantially vertical cutting edges, a diiferent plurality of blades on said rotor adapted to come into meeting cutting engagement with the blades on said casing, a plurality of matter-stirring cams provided on said rotor immediately behind each blade and gradually rising therefrom, and a groove of angular cross section provided on the cone surface of the rotor at an angle to its periphery and in the direction of its rotation, and a plurality of vanes on the bottom of said rotor.

6. The invention defined by claim 1, said rotor being re- 1 cessed at its middle portion from the bottom.

7. In a garbage grinding apparatus, a vertically extending casing, a cone shaped rotor operatively mounted within said casing, the included angle of said cone being approximately said rotor and said casing forming an annular recess having a bottom slop-ing downwardly from its center toward its circular periphery and a matter-receiving chamber above said rotor, two blades on said rotor, each of said blades having substantially vertical side edges and a substantially horizontal top edge set to overhang the bottom portion of the blade} an uneven plurality of blades provided on said casing and having sub-- stantially vertical cutting edges, theside edges of said rotor blades being adapted to come into meeting cutting engagement with the blades on said casing, and a groove provided on the cone surface of the rotor at an angle to its periphery and in the direction of its rotation.

Halstead Ian. 6, 1885 759,643 Sturtevant May 10, 1904 1,174,656 Beckwith V.. Mar. 7, 1916 

